Gutter relief valve



FIG. 1 is a perspective view of a gutter relief valve showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is an opposite side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

In FIG. 1, the broken lines showing of environmental structure for purposes of illustrating the gutter relief valve in a condition of use. The broken lines and the structure they depict form no part of the claimed design. 

CLAIM The ornamental design for a gutter relief valve, as shown and described. 